A retro-clone of the 1974 D&D box set plus the changes introduced in its very first supplement, Greyhawk ("grey hawk" = "iron falcon"). This is the earliest point in D&D's development where signature elements like variable hit dice for different classes, and weapons doing different amounts of damage, existed. Certain elements, such as Percentile Strength, Intelligent Swords, and Weapons vs. Armor Type, are given "optional" status.

Publisher blurb:

The earliest fantasy campaigns grew directly out of wargames. There was a point in the development of the first commercial role-playing game when the rules shed most of their wargame roots and assumed a form familiar to generations of players to come. Iron Falcon aims to be that game, reproducing its mechanics and style in all its raw and innovative glory, as it was before the advent of more "advanced" rules.